The liquid sheets - less than 100 water molecules thick - will let researchers probe chemical, physical and biological processes, and even the nature of water itself, in a way they could never do before.

The untethered biohybrid microswimmer is able to transport and deliver cargo encapsulated into a guidable red blood cell, while an attached bacterium, one of the most efficient swimmers in nature, acts as a propeller to move it forward. Once it has reached its destination and delivered its cargo, the scientists can destroy the microswimmer using infrared light.